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Full text of "Soft Circuits"

Space Invaders Tote 



Make] Projects 

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build, hack, tweak, share, discover,- 



Space Invaders Tote 

Written By: Syuzi Pakhchyan 



TOOLS: 



PARTS: 



Desoldering Braid (1) 
Iron (1) 

Ironing board (1) 
Needled) 

Needlenose pliers (1) 
Rosin-core solder (1) 
Scissors (1) 
Sewing machine (1) 
Sewing pins (1) 
Soldering iron (1) 
Third hand (1) 
Tracing pen (1) 
Utility knife (1) 
Wire strippers (1) 



Metallic snaps (4) 

Fabric (1 yd) 

for the exterior of bag. 

Fabric (1 yd) 

Fabric (1/2 yd) 
for Space Invader. 

Ironing board material (1/2 yd) 
for top layer of Space Invader. 

Nylon webbing (11/3 yd) 
for shoulder strap. 

Interfacing (1) 

Metal strap carriers (2) 

Metallic thread (1) 

Nonmetallic thread (1) 

Fabric fusing material (1) 

Conductive thread (1) 

Electrical Tape (1) 

Ruler (1) 

Cellphone flasher (1) 



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Space Invaders Tote 



part#PF1 001. mutr.co.uk. 

Stranded Wire (12") 

LED (2) 

Piranha high-flux LEDs are 

recommended. 



SUMMARY 

The Space Invaders are sensitive to the electromagnetic waves of mobile phones. When in 
close proximity to a mobile phone, the Space Invader is energized by an incoming call and 
its LED eyes begin to twinkle. 

Accessorized with a handmade Space Invaders Tote for an evening shindig, you will never 
miss a call again. Whether you're out in crowded loud bar or trying to be discreet at a 
friend's poetry reading, the Space Invaders Tote provides an ambient light signal letting you 
know that someone is trying to reach you. 



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Space Invaders Tote 



Step 1 — Wire the phone flasher unit. 




• The phone flasher comes with 2 LEDs presoldered on the circuit board. You will be 
removing the LEDs and replacing them with wires soldered with a pair of snaps at each 
end. A "third hand" tool is recommended. 

• Remove the batteries from the phone flasher board. 

• Using a desoldering braid, place the braid over a solder joint of an LED. Using the iron tip, 
press the tip over the braid and joint. Once the solder is molten, remove the braid. Repeat 
for the second joint, completely removing the LED from the circuit board. Repeat for the 
second LED. Both LEDs should now be removed. 

• Cut and strip the ends of four 11/2" pieces of stranded wire. Twist the ends tightly so that 
they don't fray. Next, tape the phone flasher board onto a hard surface (or use your "third 
hand" tool), making sure to leave the solder points open. 

• Before removing LEDs from phone flasher unit, test the unit first (by checking your 
voicemail, for example) to ensure that it works with your particular cellphone and/or 
that the batteries are not discharged. If the LEDs do not blink, try replacing the batteries. 







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Space Invaders Tote 



Step 2 



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• Solder one end of the stranded wire onto one of the solder points. 

• Repeat for the other 3. The wires soldered near the markings "LED1" and "LED2" on the 
board will be the negative wires, and the other 2 will be the positive. Using a black marker, 
mark the negative wires. 



Step 3 




• Grab the female ends of the snaps. 
Loop and twist one of the positive 
wires through a female snap. Add a 
touch of solder to secure the 
connection. 

• Repeat for the other positive wire 
and remaining female snap. Grab 
the male ends of the snaps. Repeat 
the process, soldering the negative 
wires to the male snaps. 



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Space Invaders Tote 



Step 4 — Cut the space invader pattern. 




• Download the Space Invader pattern under Files above or create one of your own. You will 
be making 2 Space Invaders to sew onto the upper portion of your tote, one with a pair of 
LEDs for its eyes. 

• Cut the metallic nylon ripstop fabric into four 6"x8" pieces. Fold the 6"x8" fabric in half, 
lengthwise, wrong side out, aligning edges. Pin the side of Template A marked "fold line" to 
the folded edge of the fabric. Template A will be the bottom layer of the Space Invader — 
the backing. 

• Using a tracing pen, trace the pattern onto the fabric. Cut the fabric along your traced 
lines. Repeat 3 more times, cutting a total of 4 pieces. 

• Repeat for Template B using the ironing board fabric, cutting a total of 2 pieces. Template 
B will be the top layer of the Space Invader. 

• Pin Template C onto the metallic nylon ripstop fabric and trace the template. Cut a total of 
4 pieces. Template C will be the eyes. 

• Using Template A, trace and cut 2 pieces of interfacing slightly smaller than the template. 
The interfacing will be sandwiched between the top and bottom fabric pieces to give the 
Space Invader structure. 



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Space Invaders Tote 



Step 5 — Sew the space invaders. 




• Topstitch the upper fabric layer of the Space Invader to the bottom layer. Repeat for the 
second Space Invader. 

• Topstitch the eyes on top in any desired location, preferably at least IV2" apart. This will be 
the front of the Space Invader. Repeat for the second Space Invader. 



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Space Invaders Tote 



Step 6 




• Take one of the interfacing pieces. Sandwich the interface layer between the top and 
bottom layers of the Space Invader. You can use a layer of fusing material to adhere the 
pieces together before sewing. Topstitch the 3 pieces together. 

• Mark the location of the eyes on the remaining interfacing piece. Using conductive thread, 
hand-stitch a line from the top outer section of an eye down to the bottom of the 
interfacing. This will be the negative line. Then hand-stitch a line from the bottom inner 
section of the eye down to the bottom of the interfacing. This will be the positive line. 
Repeat for the second eye. 



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Space Invaders Tote 



Step 7 








• Cut two 1"x2" pieces of fabric. Starting Vi" from the left side, using conductive thread, 
machine-sew a line from the top of the fabric, stopping W from the bottom. Leave 5" of 
loose thread at the top and bottom. Then sew a parallel line Vi" from the right side. Repeat 
for the second piece. 

• Thread a sewing needle with the loose thread from the bottom left of the fabric. Hand-sew 
a female snap, securing it to the fabric. Knot and cut off any extra thread. The female snap 
will be the negative snap. Repeat, sewing a male snap to the bottom right of the fabric. The 
male snap will be the positive snap. Repeat for the second fabric piece, this time swapping 
the placement of the snaps. 

• For the second fabric piece, swap the placement of the male and female snaps so 
that the female snap is at the bottom left and the male snap is at the bottom right. 

• Grab the interfacing layer. Place a fabric piece face down, aligning the stitch lines from the 
positive (male) and negative (female) snaps to the positive (from bottom of eye) and 
negative lines (from top of eye) sewn on the interfacing. Thread a sewing needle with the 
positive loose thread from the fabric piece. Securely sew the fabric piece onto the 
interfacing, overlapping the conducting lines from both pieces, creating a conductive path 
from the interfacing to the snap. 

• Thread a needle with the negative loose thread from the fabric piece. Securely sew the 
fabric piece onto the interfacing, making sure both negative conductive lines overlap. 
Repeat for the second fabric piece, aligning the stitch lines from the positive and negative 
lines accordingly. Place the combined top fabric layer face down. Place the interfacing 
layer directly on top of the fabric layer with the snaps facing down. Pin. 



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Space Invaders Tote 



Step 8 — Add the LEDs. 




• Turn the combined top fabric layer and interfacing layer right side up. Position an LED in 
the center of the eye square with the negative leads facing up. 

• Pierce the leads of an LED through both pieces, having the leads exit through the top of 
the interfacing. Using a pair of needlenose pliers, gently bend the leads flush to the fabric. 

• Using conductive thread, hand-sew the bottom positive leads of the LED to the positive 
stitched line on the interfacing. Be careful not to sew through the top layer. Repeat for the 
top negative leads, sewing them to the negative stitched line on the interfacing. 

• Repeat for the second LED. The positive leads of the LEDs should now be connected to 
the positive stitched line of the interface concluding at the positive male snap, and vice 
versa for the negative leads. All the positive conductive paths should now be connected 
together and all the negative paths to each other. 

• Align the bottom fabric layer on top of the Space Invader. Pin. Using scissors, cut 2" off 
the bottom fabric, creating an opening for the snap fabric strips. Topstitch the pieces 
together. 



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Space Invaders Tote 



Step 9 — Cut the bag exterior and lining templates. 




• Fold the exterior bag fabric in half, 
lengthwise, wrong side out, aligning 
edges. Pin the side of Template D 
marked "fold line" to the folded 
edge of the fabric. Using a tracing 
pen, trace the template onto the 
fabric. Cut the fabric along traced 
lines, cutting notches. 

• Mark a V2" seam line along all 
sides except the fold line. Fold the 
fabric in half along the fold line, 
wrong side out, aligning edges and 
notch marks. Machine-stitch along 
both side seam line markings. 

• Repeat for the lining fabric, but do 
not machine-stitch yet. 



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Space Invaders Tote 



Step 10 — Attach the pocket to the lining. 

















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• Pin Templates E and F onto the fabric. Trace, including the seam lines. Cut the pocket 
pieces. 

• Place one of pocket pieces wrong side up on an ironing board. Fold the seam lines inward 
and press. Repeat for second pocket piece. 

• Machine-stitch along the W seam for both pockets. The %" seam will be the top of the 
pockets. 

• Place the lining piece right side up. Center the small pocket piece, also right side up, 2" 
below the upper seam line. Topstitch the pocket piece into place. Repeat for the large 
pocket piece, aligning it ^ 3 A" from the upper seam line. The large pocket piece will cover 
the small, inner pocket piece. 

• Fold the lining fabric in half along the fold line, wrong side out, aligning edges. Machine- 
stitch along both side seam line markings. 



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Space Invaders Tote 



Step 11 — Make and attach the strap handles. 




• Fold the strap handle fabric (should be similar to the exterior fabric) in half, wrong side out. 
Pin the side of Template G marked "fold line" to the folded edge of the fabric. Trace and 
cut the template along the marking lines. Repeat cutting for a total of 2 pieces. 

• Slip the strap handle piece through a metal strap carrier. Machine-stitch Vi" from ends. 
Repeat for the second strap handle. 

• On the exterior bag fabric, position the strap carriers at opposite ends and opposite sides 
of the bag. Align the bottom of the strap carrier piece to the top of the bag, with the angled 
side facing in, and pin to the outside of the bag. Machine-stitch the strap carriers, securing 
them in place. 



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Space Invaders Tote 



Step 12 — Insert bag lining. 




• Insert lining piece, right side out, 
into the exterior bag piece. Match 
the side seams. Then fold the V2" 
seam allowances of both the inner 
and outer pieces toward each other 
and pin. Press and topstitch around 
the bag about Vi" from the edge 
(the top seam, not the sides). 

• Make two IV2" horizontal 
buttonholes 2" apart from each 
other, locating them 1" from the top 
of the large inner pocket. These 
buttonholes will be used to slip the 
snap fabric pieces through to the 
interior of the bag. 



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Space Invaders Tote 



Step 13 — Sew the space invaders. 




• Center the Space Invader without the LEDs on the bag, with 3" of it hanging off the top of 
the bag. The first Space Invader should be placed on the side of the bag without the 
pockets. Pin, then topstitch the Space Invader into place. 

• Center the second Space Invader with the LEDs on the opposite side of the bag, aligning it 
with the first Invader. Pin. Slip the snap fabric pieces through the buttonholes into the 
interior of the bag. Then topstitch the Space Invader, avoiding the interior pockets. 

• Snap the phone flasher into place and slip it into the small interior pocket. 



Step 14 — Sew on the shoulder strap. 



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• Cut the nylon webbing to your 
desired length. Slip the webbing 
through the strap handle, looping it 
over onto itself, and machine- 
stitch. Repeat, attaching the 
opposite end of the webbing to the 
second strap handle. 



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Page 14 of 15 



Space Invaders Tote 



This project is excerpted from Fashioning Technology: A DIY Intro to Smart Crafting . 

This document was last generated on 201 2-1 1 -02 08:52:52 PM. 



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